Not sure how or when to clean your solar panels?
Regular cleaning can make a noticeable difference in system performance. Dust, pollen, bird droppings, wildfire residue, and snow can all block sunlight and reduce efficiency—sometimes by 5–20%. Here’s how to clean your panels safely and keep them running at their best, especially in a climate with seasonal changes.
1. When Should You Clean Your Panels?
For most homes, cleaning your panels once or twice a year is enough. Ideal times include:
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After spring pollen season
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Late summer, after dry, dusty weather or wildfire smoke
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Before winter, to remove debris that could be trapped under snow
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After long snow-covered periods, especially if dirt is left behind after melting
Tip: Use your solar monitoring app to watch for dips in performance during sunny days. If output drops consistently, your panels might need a cleaning.
2. How to Clean Your Panels Safely
What You’ll Need:
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A soft-bristled brush or non-abrasive sponge with an extension pole
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A hose with a spray nozzle (gentle pressure only)
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Deionized or distilled water (optional, to avoid mineral spots)
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A microfiber cloth or squeegee for drying (optional)
Cleaning Steps:
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Shut down your solar system before cleaning. Always follow your inverter’s manual.
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Rinse the panels with cool or lukewarm water. Avoid hot water on cold glass to prevent cracking.
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Gently scrub the surface with a soft brush or sponge. Avoid abrasive materials or harsh chemicals.
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Rinse thoroughly to remove all dirt and any soap residue.
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Let air dry, or use a soft cloth if needed to wipe away remaining moisture.
Important: Never use pressure washers, metal tools, or strong detergents. These can damage the panels or void your warranty.
3. How to Handle Snow and Ice
In most cases, snow will melt and slide off panels on its own, especially if they're installed at a steep angle. However, after heavy snowfall or freezing rain, you may want to help clear them:
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Use a soft-edged snow rake or foam broom with a long handle to gently push snow off from the ground.
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Do not use hot water—it can crack the glass from sudden temperature change.
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If panels are hard to reach or located on a steep roof, it’s safest to let the sun do the work or contact a professional.
Tip: A thin layer of snow might still allow light through. Your system can often generate some power even when partially covered.
4. Extra Maintenance Tips
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Watch for bird droppings or nests—these can block sunlight and create mess.
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After wildfire season, soot and ash buildup can reduce performance.
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Use panel-level monitoring if available to check performance across individual panels.
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Consider hiring a professional cleaner if your panels are difficult to access or very dirty.
📋 Quick Cleaning Checklist
| Task | Why It Matters |
|---|---|
| Check for dirt, dust, or debris | Blocks sunlight, reduces efficiency |
| Clean after pollen, smoke, or snow | Restores full light absorption |
| Shut down system before cleaning | Safety first |
| Use soft tools and gentle water | Avoids scratching or damaging the panels |
| Avoid pressure washers and chemicals | Prevents warranty issues and glass damage |
💡 Still have questions? Call us at 1-888-421-5354 or email hello@solarpowerstore.ca. To submit a support request, please use the form located below this article. If you'd like to speak with our team directly, you can also book a meeting here.